Rotary pump



(No Model.) 4Sheets-Sheet 1. E. H. GOLLINGS.

ROTARY PUMP.

No. 448,834. Patented Mar. 1 7, 1891..

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(No Model.) 4 Sheets-Sheet 2. E. H. GOLLINGS.

ROTARY PUMP.

No. 448,334. Patented Mar. 17, 18-91.

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(No Model.) 4 Sheets-Sheet 3.

E. H. GOLLINGS.

ROTARY PUMP.

No. 448,334. Patented Mar. 17,1891.

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(No Model.)

B. H. GOLLINGS.

ROTARY PUMP.

Patented Mar. 17, 1891.

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ELLICK H. GOLLINGS, OF LEIVISTOMIDAHO, ASSIGNOR TO THE GOLIJINGS BI-CENTRIC PUMP COMPANY, OF CHICAGO, ILLINOIS.

ROTARY PUMP.

SPECIFICATION forming part of Letters Patent No. 448,334, dated March 17, 1891.

Application filed March 1, 1889. Serial No. 301,675. (No model.)

To (tZZ whom, it may concern.-

Be it known that I, ELLIOK ,I-I. GOLLINGS, a citizen of the United States, residingin Lewiston, in the county of Nez Perces and Territory of Idaho, have invented a new and useful Improvement in Rotary Pumps, of which the following is a specification.

This invention is intended to provide a construction in rotary pumps by which they will be rendered more eifective for the elevation of water to considerable heights, andby which the water will be discharged in a constant stream practically devoid of pulsations. I employ in its construction a suitably-supported non-rotating shaft which is hollow at both ends, one end serving as an inletpassage for the water and the other as a discharge or outlet passage. Upon this shaft is concentrically mounted a rotary shell or hollow wheel. Both water-passages in the shaft have lateral ports within this shell and on opposite sides of the shaft. Within the-central part of the shell and between the ports is a wheel of smaller diameter than the interior of the shell, having radially-partitioned chambers or watenspaces and mounted upon an eccentric portion of the same shaft that carries the shell. This wheel is mechanically connected with the shell in such manner as to rotate with the same number of revolutions in a given time and at a practically uniform rate of speed, while it has an independent eccentric movement within the shell. By reason of this uniform rotary speed of the eccentric-wheel the stream discharged by the pump is substantially uniform and is deprived of those pulsations and irregularities which are observed in the streams discharged by rotary pumps generally. The eccentric-wheel may be, and preferably is, a rimless one composed of a series of wings, which are prolonged by hinged vanes of the same width as the wings themselves. In the eccentric movement of the inclosed wheel the free ends of these vanes preserve contact with the interior periphery of the shell, and they therefore serve to successively enlarge and contract the wator-spaces within the wheel, which spaces they in part inclose. In the preferred form of construction herein illustrated the spaces of the eccentric-wheel are open at both sides of the latter, and the shell is also divided at each side of the wheel into a series of chambers or pockets by radial partitions corresponding in number with the wings of the eccentriewheel. These chambers of the shell are open to receive and discharge directly from and into the shaft-passages, while they also com municatedirectly with the interspaces of the cocentric wheel. Said chambers or partitions of the shell, however, do not extend outwardly from the shaft beyond the hinges of the vanes, the end plates of the shell exterior to said hinges being parallel and continuous. Said shell-partitions desirably do not bear upon the shaft, except where the latter is provided with longitudinal ribs at opposite sides of the shaft and at the opposite sides of the ports or passages which give communication from the interior of the shaft to the interior of the shell. The width of each of these ribs is such that at all times some one of the partitions will be in contact with it, one partition moving to or over each rib as soon as or before the preceding partition has passed beyond it. These ribs are in the same plane with each other and in the same plane with the longest throw of the eccentric, and the driving connections between the shell and wheel are so arranged that the wings of the eccentric-wheeland the partitions of the shell will coincide with each other on both sides of the shaft in this same plane of the longest throw of the eccentric. By this construction and arrangement the interior of the shell, including the interspaces of the eccentric-wheel contained therein, is divided into two parts in the plane of the axes of the wheel and eccentric-wheel, one of said parts being in communication with one port of the shaft and the other part in com munication with the other port of said shaft. By the rotation of the shell and its contained wheel the separate chambers in one of these parts will expand or be enlarged progressively from the beginning to the end of their semicircular movement, and in their following semicircular movement in the other half of their revolution they Will progressively contract. By such progressive enlargement they allowthe water or other liquid being pumped to enter them, and by their subsequent progressive contract-ion they operate to expel the water. That port which is connected with the half of the shell-space in which the chambers progressively expand willbethe inlet-port and the other will be the outlet-port. In order to rotate the inclosed eccentric-wheel by rotation of the shell and to give it the same number of rotations and a practically uniform speed, a series of projections are provided on the wheel, which successively engage one at a time with suitable surfaces on the shell, such engagement in the case of each projection taking place outside the plane of division above pointed out or outside the plane of the throw of the eccentric. To obtain the greatest uniformity of rotative speed between the shell and wheel, the driving on gagement referred to should take place, and is herein shown to take place, in a short are midway of the half-circle cut oif by said plane of greatest eccentricity, for the reason that the arc of contact (nearly a plane) is then practically parallel with the plane of greatest eccentricity, and the point of contact on the shell is therefore at practically the same distance from the center of the shell as the point of contact on the wheel is from the center of the wheel. lVith this construction of the shaft, shell, and eccentric-wheel, and with the resulting uniform or substantially uniform speed of the eccentric-wheel having the same number of rotations as the shell, a constant flow or stream will be produced which will be free from pulsations and unsteadiness.

The essential features of my pump are fully disclosed by the accompanying drawings, in which two forms of construction are illustrated.

In said drawings, Figures 1 to 4;, inclusive, illustrate one form of my invention. Fig. 1 is a vertical cross-section showing the interior of one-half the shell with the eccentricwheel in position therein. Fig. 2 is a longitudinal'vertical section on the line 2 2 of Fig. 1. Fig. 3 is a section similar to Fig. 2 upon line 3 3 of Fig. 1, and Fig. 4 is a cross-section similar to Fig. 1 with the eccentric-wheel removed. Figs. 1, 2, 3, and 4: are views similar to the preceding, but illustrating a modified construction.

First describing the construction illustrated in Figs. 1 to 4:, inclusive, A represents a stationary frame having supports a, one at either end, by which the non-rotating shaft B is upheld. This shaftis shown made of an integral piece, hollow at either end to provide water-ways, the passage 1) at one end being the water-inlet and the passage 6 at the other end being the outlet on the assumption that the rotation of the shell and its contained wheel is from left to right of Figs. 1 and 4.

, Between these passages 12 b the shaft B is solid or closed, as indicated at b Ports b b lead from said passages, respectively, to the interior of the shell on opposite sides of the shaft and on different sides of the eccentric-wheel.

C O are two parts or end plates of the has a hearing, as 0, upon the shaft B. The

shell is confined longitudinally upon the shaft by collars 17 one at either end of the shell, said collars being screw-threaded upon the shaft B, so as to be adjustable toward and from the shell and being held from rotation by set-screws a in the arm a of the frame. Packing may be employed in the several bearings of the shell upon. the shaft, as indicated at of. The central portion of each part 0 of the shell is made concavo-convex in form, as shown in Figs. 2 and 3, and the interior of this portion of each end of the shell is divided into a series of chambers or pockets d d by partitions D D, located in radial planes and separated by spaces next the shaft B. The ports b and h are located abreast of these chambers, so that the feed-port discharges directly into the chambers d and the delivery-port receives directly from the chambers d. the shaft is provided with a longitudinal rib H, of suitable width to extend from one partition to the next, so that one partition is always in contact at its inner edge with said rib. The ribs H are on diametrically-opposite sides of the shaft B, and are all in the same plane of the greatest throw of the eccentric. While passing these ribs the partitions of the shell form practically watertight join ts with them.

The eccentric-wheel within the shell is composed of a series of radial wings-F, projecting from a hub e, said partitions corresponding in number with the partitions D D in each end of the shell, and, like said partitions, being separated by equal spaces. The eccentrio-wheel is shown as having a two-partbushing 6, which embraces the eccentric portion 12 of the shaft B, which bushing rotates with the wheel, thus giving a reduced eccentricjournal upon which the wheel turns. To the outer end of each wing E of the eccentricwheel is hinged a vane F. The hinge, as shown, consists of a transverse socket f in the end of the wing, into which the parti-cylindric edge of the vane is inserted. The sockets ff are preferably open at the sides of the wings to allow the vanes to he slipped into them sidewise. The free ends of the vanes F are held in close contact with the inner periphery of the shell by means of pins f, which project laterally from the vanes and enter slots f in the adjacent face or faces of the shell. For the radial space occupied by these vanes F the inner faces of the parts 0 O of the shell are parallel and closed or continuous. The slots f are elongated to allow the eccentric movement of the wheel, in which movement the pins f move constantly from end to end of the slots.- The vanes incline over the radial water-spaces g, formed between the wings E of the eccentric-wheel, and are in effect yielding extensions of said wings,

At each side of each port 17' and b i ICO moving inward and outward with respect to the wheel under the control of the eccentric upon which said wheel rotates. The spaces g of the eccentric-wheel form the communicatin g passages between the chambers d d of the shell, there being a passage or space gfor each pair of opposite chambers d d. The partitions D D of the shell and the wings E of the eccentric-wheel are of even number, so that one partition orone wing on one side of the axis of the shell or wheel is, in line with a partition or wing on the opposite side. The driving connections by which the interior eccentric-wheel is driven from the shell are so located that two opposite partitions at each end of the shell will coincide with opposite wings of the eccentric-wheel in the plane of the greatest throw of the eccentric and in the plane of the ribs H H, so that there shall be by such coincidence of partition and wings a longitudinal division of the entire space within the shell into two parts, one of which communicates with the inlet-port of the shaft and the other with the outlet-port of said shaft.

In the construction shown in Figs. 1 to 4.- the driving connection between the shell and wheel consists of the pins f, projecting from the vanes F and working in the slots f, as above described. hen these pins and slots are relied upon to carry the eccentric-wheel with the shell in the rotary movement of the latter, some one of the pins will always be in bearing against the back end of the corresponding slot, and the eccentric-wheel will thus be pushed by the shell. To locate the slots properly to drive the wheel and to give the desired coincidence to the wings and partitions, as above set forth, in the plane of greatest eccentricity of said wheel,the wheel and shell are first placed with the partitions and wings coincident in said plane, and apin is selected outside of said plane, (preferably the pin most remote from it,) for which a slot is laid out to bear at its rear end against said pin. After this slot is located the others are located at equal distances from each other in a circle concentric with the axis of the shell, and of course the slots will correspond in number with the pins on the vanes, so as to afford one slot for each pin. Each pin and slot will have driving contact at the selected point in each revolution of the shell, and said pins will therefore act singly and in succession to give rotary motion to the eccentric-wheel. The inner or eccentric wheel, being connected with the shell by hinged vanes and pins, as above described,will manifestly make the same number of revolutions as the shell and have practicallya uniform speed, by reason of the large number of said pins all acting successively through the same short arc of contact. By reason of such uniform speed of the shell and wheel not only is a steady and pulseless flow of Water produced, but the friction between the surfaces of the two rotating parts in contact is reduced to aminimum, the friction actually present being only such as results from the eccentricity of the inner wheel. Another advantage of thesimultaneous and uniform rotation of the wheel and shell is that at all points where these two parts arein contact the friction is the same and the wear is consequently the same or is uniform throughout the entire structure. The shell may be driven by means of an external rack m or otherwise.

In the construction described, in which the partitions D D and the wings E are made to coincide in the plane of greatest throw of the eccentric, the interior of the shell is divided into two parts out off from each other,

but communicating one with the inlet-port and the other with the outlet-port of the shaft B. In the rotation of the shell and wheel the chambers or water-spaces within the shell and wheel are severally expanded during their half-circular movement on that side on which they communicate with the outlet-port. As a consequence water is admitted to one part of said shell and wheel While it is being expelled from the other. i

In the modification shown at Figs. 1, 2, 3, and 4 the radial partitions of the shell are omitted, the eccentric-wheel is closed at the sides, (except that ports are formed near the aXis,) and the shaft is provided with partiannular flanges, one at either side of the wheel and on opposite sides of the shaft, each of which flanges closes one-half of such axial ports of the eccentric-Wheel. Referring to these figures,in whichI have, so far as possible, employed the same letters of reference as are used upon the other figures, the shaft is shown made in parts, the end portions B being separate from the middle portion and the latter being also made in parts, one of which E is the axis of the eccentric, corresponding to the part b of the previous construction, another B the portion in which is formed the inlet-port Z9 and still another 13* the part in which is formed the ontlet-portb. The shell is shown provided with annularenlargements M and N, affording spaces which surround the ports Hand B", as shown clearly in Figs. 2 and 3. The eccentric-Wheel in this modified construction is formed with two side Walls g g, laterally inclosing the radial spaces g, and it is also shown as having a rim uniting the two sides g g, which is provided with water-passages 9 giving communication of said spaces with the surrounding space of the shell. These radial spaces g also communicate with the spaces M an d N withinthe shell through passages or ports i near the axis of the wheel. Half of the ports fare at all times closed by one of the stationary flanges .I, and the other half on the opposite side of the wheel are at the same time closed by the other of said stationary flanges. These flanges are for this purpose made to overlap each other at their ends, so that no one space in the cocentric-wheel can at the same time comm unicate with the spaces M and N. They thus perform the same function as the ribs H H, in connection with the partitions D D, of the construction shown in the preceding figures of the drawings.

The eccentric-wheel in the figures now being described is provided with vanes or yielding extensions F, essentially like those already described; but, not being relied upon for driving the eccentric-wheel from the shell, the free ends of said vanes are held in contact with the inner periphery of the shell by projections at the ends of the said vanes, which run in a continuous groove 19 in the shell adjacent to the periphery of the shell. To cause the rotation of the eccentric with and by the shell in this modified construction, I have shownrpins s, projecting from the side of the eccentrie-wheel into circular recesses 3, larger than the diameter of the pins and located in the abutting side of the shell. This enlarged and circular form of the recesses s is necessary,because every part of the eccentric-wheel performs a circular motion with respect to an abutting surface of the shell, the radius of such circular motion being equal to the throw of the eccentric. The diameter of these recesses 3 must therefore be at least double the radius of the eccentric plus the diameter of the pin 19. Theoretically and with accurate construction providing for simultaneous contact of all the pins with the walls of the recesses one-half the number of pins and recess-surfaces will obviously be concerned in driving the wheel from the shell; but after wear or in the absence of such accurate construction one after another of these pins serves to give the driving connection between the wheel and the shell, as already described, of the pins upon the vanes working in the slots, as illustrated, in the precedingfigures of the drawings. To locate the recesses s or the pins in the modified construction, the eccentric-wheel is first brought into such a position that the parti-annular flanges J will severally fully close a series of the ports 1', and after the first recess or pin is located the others are given position atequal distances therefrom in lines concentric severally with the wheel or shell.

Certain features of construction shown in Fi 1, 2, 3, and et are made the subjects of claims in another application for patent,

Serial No. 333,767, pending simultaneously with this. The shell in this modified construction fits closely against the closed sides ries of inlet and outlet passages surrounding the shaft, a wheel mounted within the shell upon the eccentric portion of the shaft, a series of parts crossing the space between the wheel and the surrounding shell and successively forming a division of said space substantially in the plane of the eccentric, a series of driving connections engaging the shell with the wheel, whereby one of these members is rotated by and with the other, said series of driving connections acting successively outside the plane of division, and means for admitting and discharging a fluid to and from the passages on opposite sides of the division of the space between the shell and wheel.

2. In a rotary pump, the combination, with a stationary shaft provided with an eccentric portion and having interior passages at its ends opening on opposite sides of the shaft, of a rotating shell supported 011 the concentric portions of the shaft and covering said ports or openings, a wheel mounted on the eccentric portion of the shaft and provided with radial spaces extending through it, which are successively enlarged and contracted in the rotation of the wheel, a changeable part of the spaces-in the eccentric-wheel being in communication with the inlet-port of the shaft and the other changeable part of the spaces being in communication with the outside of said shaft, and means for driving the said eccentric-wheel at a practically uniform speed with the shell and at the same number of revolutions in a given time as the shell, substantially as described.

3. The combination, with a shaft having an ccentric portion, of a rotating shell mounted upon the concentric portion of the shaft, a wheel mounted within the shell upon the cocentric portion of the shaft, said wheel having radially-divided spaces which are successively enlarged and contracted in the rotation of said wheel, separated passages within the shaft, having ports on opposite sides thereof within the shell, means for cutting off communication of each of said ports with a changeable part of the spaces within the eccentric-wheel while giving communication of the same port with another and changeable part of said spaces, and a series of succes sively-engaging projections by which the eccentric-wheel is driven by the shell at a practically uniform rate of speed and at the same number of revolutions within a given time as said shell, substantially as described.

4. In a rotary pump, the combination of a rotating shell, an eccentric-wheel within the shell, provided with a series of chambers radially divided by extensible partitions'extending to the inner periphery of the shell, the space within the shell being divided into separated parts upon a substantially fixed plane, which is that of greatest eccentricity, two axial passages, one communicating with one of said parts of the space embraced by the shell and the other with the other, and

means for driving the eceentric-wl'leel from and at the same rate of speed as the shell, substantially as described.

5. The combination, with the norrrotatiug shaft, the rotating shell, and the rotating eccentric and chambered wheel, of a series of driving-projections on one of the rotating parts engaging surfaces upon the other singly and in succession, said projections making such engagement outside the plane of greatest eccentricity of the wheel-axis.

6. The combination of a non-rotating shaft, a rotating shell mounted concentrically upon the shaft and provided at each end with a series of radially partitioned chambers surrounding the shaft and opening both toward the shaft and toward each other, an eccentricwheel within the shell, having a series of radially -partitioned spaces corresponding in number with the chambers at either end of the shell and open at both sides and also toward the periphery of the shell, yielding extensions of the partitions which separate the chambers of the eccentric-wheel and which prolong said partitions to the periphery of the shell, and driving connections by which the eccentric-wheel is driven from the shell at the same speed, the shaft being provided with axial passages opening on opposite sides of the shaft and in communication with separated groups of shell-chambers, substantially as described.

7. In a rotary pump,a rotating shell receiving and discharging the fluid at its ends, in combination with an eccentrically-mounted wheel located in and rotated by and in uni son with the shell and dividing the same centrally, said wheel having variable passages open at its sides, and said shell being divided longitudinally at each end, substantially as set forth.

8. In a rotary pump, the combination of a rotating shell and an eccentric-wheel rotating with the shell and filling the centerthereof, a feed-passage opening into said shell at one side of the wheel, and a discharge-passage leading therefrom at the other side of said wheel, said wheel having passages variable in capacity, which are open to receive and discharge the fluid at the sides of the wheel, and the shell being divided longitudinally at each side of the wheel, substantially as specified.

9. The combination, with the shaft having passages and ports, as set forth, of a rotating hollow shell inclosing said ports and a rotating winged eccentric-wheel carrying movable vanes, essentially as described, the shell being divided by radial partitions at either side of the eccentric-wheel, substantially as described.

10. The combination, with the shaft having passages and ports, as specified, of a rotating hollow shell inclosing said ports and a rotating winged eccentric-wheel carrying vanes, essentially as described, the shell being divided into chambers at either side of the wheel. by equally-spaced partitions'agreeing in number with the equally-spaced wings of the eccentric and forming close joints therewith, substantially as set forth.

1.1. The shaft having passages and ports, as specified, and also having longitudinal ribs H, in combination with the partitioned shell. and the eccentric winged wheel rotating 011 the shaft, the partitions of the shell forming close joints with the ribs II as they pass the latter, substantially as set forth.

12. The combination, with the shaft having feed and discharge passages and ports at opposite sides, of a rotating hollow shell inclosing said ports, and a rotating eccentric winged wheel dividing the interior of the shell and carrying inclined pivoted vanes which are mechanically held against the inner surface of the shell, substantially as set forth.

3. The combination, with the shaft having the passages and ports, as specified, of a rotating hollow shell inclosing said ports, and a rotating winged eccentric-wheel, the wings whereof carry vanes expanding and contracting, as set forth, and extending over the spaces between the wings, said vanes having pins working in slots in the shell, substantially as set forth.

14:. The combination, with the shaft having the feed and discharge passages and ports at opposite sides, of the hollow chambered rotating shell and the eccentric winged wheel inclosed within and rotating with the shell and having peripheral vanes, substantially as set forth- 15. The combination of a shaft having an. eccentric portion and a concentric portion, a rotating shell mounted on the concentric portion of the shaft, a rotating wheel mounted on the eccentric portion of the shaft, and a series of radially-movable parts connected with the shell and having contact with its inner periphery and also engaging with the wheel, said radially-movabl e parts successively forming means by which one of said rotating members is driven from the other, and also forming means for dividing the spaces between the shell and the wheel into receiving and discharging chambers.

ELLICK n. GOLLINGS.

Witnesses:

H. M. MUNDAY, MAcK A. CLAFLIN. 

